There is an interesting tool that helps you to translate AutoCAD DXF drawings (versions 2000-2007).
It is a shareware tool called TranslateCAD. You need to get a license, but it has a nice user interfase and offers technical support.
The trial version works well for drawings with 50 words or less (even if the drawing is a big file).
It fully supports Unicode to facilitate the translation of any language.
Since it generates a small text file, you may use with any CAT tool (Trados, Wordfast, DejaVu, SDLX, MetaTexis, etc.).
I hope it helps!